From: Xiubo Li xiubli@redhat.com
commit e7d84c6a1296d059389f7342d9b4b7defb518d3a upstream.
MDS expects the completed cap release prior to responding to the session flush for cache drop.
Cc: stable@vger.kernel.org Link: http://tracker.ceph.com/issues/38009 Signed-off-by: Xiubo Li xiubli@redhat.com Reviewed-by: Venky Shankar vshankar@redhat.com Reviewed-by: Jeff Layton jlayton@kernel.org Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ceph/mds_client.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3496,6 +3496,12 @@ static void handle_session(struct ceph_m break;
case CEPH_SESSION_FLUSHMSG: + /* flush cap releases */ + spin_lock(&session->s_cap_lock); + if (session->s_num_cap_releases) + ceph_flush_cap_releases(mdsc, session); + spin_unlock(&session->s_cap_lock); + send_flushmsg_ack(mdsc, session, seq); break;